2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/119751In this paper, we present a nano-quantum photonic model for justification of normal dispersion in a thin crystal film of NPP. In this method, we assume a laser beam consists of a flow of energetic particles. By precise analyzing of photon interaction with pi-electron system of benzene ring in NPP crystal, we will attain refractive index (RI) in any wavelength and compare the results with experimental data.15 pages must be reduced to 8 pagesQuantum Physicstext